Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd79597fefe65a3a1f624ff71eab22dfb2fe2c32fab74bfc836b0c5ce567cae75' 
  AND token = 'wSncLQTIdsslXm8UWI96whGFMHfD0BVuWKZYtHWLRKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}